Potential utilization of recycled PET in comparison with liquid crystalline polymer as an additive for HDPE based composite fibers: Comparative investigation on mechanical performance of cross-ply laminates

Supattra Kayaisang; Taweechai Amornsakchai; Sunan Saikrasun

doi:10.1515/polyeng-2013-0155

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Potential utilization of recycled PET in comparison with liquid crystalline polymer as an additive for HDPE based composite fibers: Comparative investigation on mechanical performance of cross-ply laminates

Supattra Kayaisang , Taweechai Amornsakchai and Sunan Saikrasun

Published/Copyright: November 23, 2013

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From the journal Journal of Polymer Engineering Volume 33 Issue 9

Abstract

Recycled polyethylene terephthalate (rPET) was used as an alternative reinforcing material for in situ microfibrillar-reinforced polyethylene (PE) based composite fibers and compared with liquid crystalline polymer (LCP). The neat PE and its composites reinforced with LCP and rPET microfibrils under the compatibilizing promotion of 5 wt% styrene-(ethylene butylene)-styrene-grafted maleic anhydride (SEBS-g-MA) compatibilizer, were prepared as fibers using a hot drawing process. Cross-ply laminates of the neat PE and the compatibilized composite fibers were then prepared using a film stacking method. The tensile, flexural and impact performances of each laminate system were examined and compared. Under tensile loading, no significant differences in the initial part of the stress-strain curves, and hence comparable tensile modulus (≈4 GPa) among all laminates, were observed. A difference was only seen in the final part of the curves. For flexural properties, the flexural moduli of the compatibilized LCP- and rPET-composite laminates were nearly the same (≈3 GPa). At high flexural strains (>1%), the different stress-strain behaviors of the laminates were clearly observed. Interestingly, the compatibilized rPET-composite laminate showed much better impact-resistance compared with PE- and compatibilized LCP-laminates. The results demonstrated a high potential for use of the rPET-composite fiber laminate in impact-resistant applications.

Keywords: composite fiber; laminate; liquid crystalline polymer; mechanical property; polyethylene; recycled PET

Corresponding authors: Sunan Saikrasun, Chemical Creativity and Innovation Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahasarakham University, Mahasarakham 44150, Thailand, e-mail: sunan.s@msu.ac.th; and Taweechai Amornsakchai, Center for Alternative Energy, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, 999 Phuttamonthon 4 Road, Salaya, Nakhon Pathom 73170, Thailand, e-mail: sctam@mahidol.ac.th

Financial support from the Center of Excellence for Innovation in Chemistry (PERCH-CIC), Office of the Higher Education Commission (OHEC), Ministry of Education, is gratefully acknowledged. We also would like to acknowledge Mahasarakham University (graduate grant: fiscal year 2012), the Higher Education Research Promotion and National Research Universities Development, and Faculty of Science, Mahasarakham University, for partial financial support.

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Received: 2013-6-29

Accepted: 2013-10-9

Published Online: 2013-11-23

Published in Print: 2013-12-01

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Articles in the same Issue

https://doi.org/10.1515/polyeng-2013-0155

Keywords for this article

composite fiber; laminate; liquid crystalline polymer; mechanical property; polyethylene; recycled PET